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alexbejjani
@alexbejjani
January 2021
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Bonsoir est ce que vous pouvez m'aidez à ces exercices (33et 34)
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PAU64
Exercice 33 :
Pour additionner deux fractions, il faut qu'elles soient sur le même dénominateur (= chiffre du bas).
a. 1/2 + 1/4
=
+ 1/4
= 2/4 + 1/4
= 3/4
b. 5/6 + 5/12
=
+ 5/12
= 10/12 + 5/12
= 15/12
=
= 5/4
c. 13/14 + 5/7
= 13/14 +
= 13/14 + 10/14
= 23/14
d. 3/4 + 5/24
=
+ 5/24
= 18/24 + 5/24
= 23/24
e. 6/7 + 2/35
=
+ 2/35
= 30/35 + 2/35
= 32/35
f. 11/81 + 1/9
= 11/81 +
= 11/81 + 9/81
= 20/81
Exercice 34 :
Pour soustraire deux fractions, il faut qu'elles soient sur le même dénominateur (= chiffre du bas).
a. 12/13 - 7/13
= 5/13
b. 1/3 - 1/6
=
- 1/6
= 2/6 - 1/6
= 1/6
c. 9/4 - 5/12
=
- 5/12
= 27/12 - 5/12
= 22/12
=
= 11/6
d. 5/6 - 3/48
=
- 3/48
= 40/48 - 3/48
= 37/48
e. 9/7 - 64/63
=
- 64/63
= 81/63 - 64/63
= 17/63
f. 19/99 - 1/11
= 19/99 -
= 19/99 - 9/99
= 10/99
2 votes
Thanks 0
PAU64
j'ai vérifié à la calculatrice tout est juste :)
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Bonsoir pouvez me faire l'exercice 46 merci
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Bonsoir pouvez vous m'aidez a l'exercice 45 merci davance
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Lista de comentários
Pour additionner deux fractions, il faut qu'elles soient sur le même dénominateur (= chiffre du bas).
a. 1/2 + 1/4
= + 1/4
= 2/4 + 1/4
= 3/4
b. 5/6 + 5/12
= + 5/12
= 10/12 + 5/12
= 15/12
=
= 5/4
c. 13/14 + 5/7
= 13/14 +
= 13/14 + 10/14
= 23/14
d. 3/4 + 5/24
= + 5/24
= 18/24 + 5/24
= 23/24
e. 6/7 + 2/35
= + 2/35
= 30/35 + 2/35
= 32/35
f. 11/81 + 1/9
= 11/81 +
= 11/81 + 9/81
= 20/81
Exercice 34 :
Pour soustraire deux fractions, il faut qu'elles soient sur le même dénominateur (= chiffre du bas).
a. 12/13 - 7/13
= 5/13
b. 1/3 - 1/6
= - 1/6
= 2/6 - 1/6
= 1/6
c. 9/4 - 5/12
= - 5/12
= 27/12 - 5/12
= 22/12
=
= 11/6
d. 5/6 - 3/48
= - 3/48
= 40/48 - 3/48
= 37/48
e. 9/7 - 64/63
= - 64/63
= 81/63 - 64/63
= 17/63
f. 19/99 - 1/11
= 19/99 -
= 19/99 - 9/99
= 10/99